Sahih Muslim | Book 23 | Chapter 31
Narrated by Abu Huraira
Abu Huraira reported Allah's Messenger (may peace be upon him) as saying: Food for two persons suffices three persons and food for three persons suffices four persons.
Narrated by Jabir b. 'Abdullah
Jabir b. 'Abdullah reported: I heard Allah's Messenger (may peace be upon him) as saying: Food for one person suffices two persons and food for two persons suffices four persons, and food for four persons suffices eight persons; and in the tradition transmitted on the authority of Ishaq there is no mention of the fact that he heard it directly (from the Holy Prophet).
A hadith like this is reported on the authority of Jabir but with a different chain of transmitters.
Narrated by Jabir
Jabir reported Allah's Messenger (may peace be upon him) as saying: Food for one suffices two and food for two suffices for tour.